We look at the division of 699856 by 51 
The aim is to understand the frequency of 51 in 699856.

Advancing to step 1:
51 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 51

Step 2:
When dividing 69 by 51, we get 1 with a remainder of 18.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 51 from 69 and we're left with 18.
Include the next digit (9) from the dividend after 18, then repeat: 189 / 51

On to step 3:
The number 51 fits into 189 3 times, leaving a remainder of 36.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we take 153 away from 189, we end up with 36.
Include the next digit (8) from the dividend after 36, then repeat: 368 / 51

Let's proceed to step 4:
If we divide 368 by 51, we get 7 and a remainder of 11.
The number 7 becomes the next digit in our result. 
Result so far: 137.0
If we subtract 357 from 368, we get 11.
Append the next digit (5) from the dividend to 11 and continue with: 115 / 51

Step 5:
The number 51 fits into 115 2 times, leaving a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 1372.0
If we take 102 away from 115, we end up with 13.
Append the next digit (6) from the dividend to 13 and continue with: 136 / 51

On to step 6:
The number 51 fits into 136 2 times, leaving a remainder of 34.
The number 2 becomes the next digit in our result. 
Result so far: 13722.0
Deduct 102 from 136 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 7:
If we divide 340 by 51, we get 6 and a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 13722.6
Subtracting 306 from 340 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 8:
If we divide 340 by 51, we get 6 and a remainder of 34.
The next digit of our result is 6. 
Result so far: 13722.66
Subtracting 306 from 340 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Our division results in 13722.66 with a remaining 0.034.